Obviously Westerners are the most pollutive people per capita, but China and India act as though being developing countries means they can just make the same dumb mistakes. More to the point, India and China actually have the most to gain from cleaning up their industry. Whilst they argue for what they view as beneficial rights, the simple fact is that in the long term they are just running up a massive public health bill and destroying the factor endowments of their respective countries.